Brandwave

How popular isNotebookLM?

In September 2026, people searched for NotebookLM by name about 24.5 million times worldwide, a 106.1% increase from the previous year. These searches made up 81.9% of all global AI summarisation tool searches, placing NotebookLM first out of five tools. When we asked both ChatGPT and Google AI Overviews about AI summarisation tools, NotebookLM appeared in three of the five answers and was the fourth most recommended of the five.

Search and AI answers in September 2026

NotebookLM is the most searched of 5 competitors and the fourth most recommended in AI answers.

  1. NotebookLMShare of searches 81.9%Mentioned in 3 of 5 AI answersPlace in AI recommendations 4th
  2. QuillBotShare of searches 16.7%Mentioned in 2 of 5 AI answersPlace in AI recommendations 2nd
  3. OtterShare of searches 1.3%Mentioned in 0 of 5 AI answersPlace in AI recommendations –
  4. ScholarcyShare of searches 0.05%Mentioned in 2 of 5 AI answersPlace in AI recommendations 3rd
  5. TLDR ThisShare of searches <0.01%Mentioned in 2 of 5 AI answersPlace in AI recommendations 1st
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Top AI summarisation tools in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, NotebookLM was mentioned in three out of five: in all three ChatGPT answers, but not in either of the two Google AI Overviews. NotebookLM is the fourth most recommended of the five.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. TLDR This1st
  2. QuillBot2nd
  3. Scholarcy3rd
  4. NotebookLM4th
  5. Otter–

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • NotebookLM3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • QuillBot2 of 5Named in 0 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Scholarcy2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • TLDR This2 of 5Named in 0 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Otter0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers

See every answer about AI summarisation tools

5 answers

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in the United States on October 20, 2026.

Which AI summarisation tools compete with NotebookLM?

NotebookLM against AI summarisation tools worldwide, by month

Share of searches by month for NotebookLM, QuillBot. The figures are in the table below the chart.

View monthly share of searches table
MonthNotebookLMQuillBotOtterScholarcyTLDR This
Oct 202554.9%42.2%2.6%0.19%0.02%
Nov 202558.9%38.9%2%0.14%0.02%
Dec 202571.4%26.8%1.7%0.12%0.02%
Jan 202675.1%23%1.8%0.1%0.01%
Feb 202675.1%23%1.8%0.1%0.01%
Mar 202675.2%23%1.8%0.1%0.01%
Apr 202681.6%16.7%1.6%0.07%0.01%
May 202681.9%16.8%1.3%0.06%<0.01%
Jun 202681.9%16.7%1.3%0.05%<0.01%
Jul 202681.2%17.2%1.6%0.04%<0.01%
Aug 202678.7%19.7%1.5%0.04%<0.01%
Sep 202681.9%16.7%1.3%0.05%<0.01%

  1. 1.NotebookLM

    81.9%

    Held 1st. 24.5M estimated branded searches, +22.8% vs prior month. Share +3.2 points.

  2. 2.QuillBot

    16.7%

    Held 2nd. 5M estimated branded searches, 0% vs prior month. Share -3 points.

  3. 3.Otter

    1.3%

    Held 3rd. 382K estimated branded searches, -0.02% vs prior month. Share -0.2 points.

  4. 4.Scholarcy

    0.05%

    Held 4th. 14.8K estimated branded searches, +49.5% vs prior month. Share 0 points.

  5. 5.TLDR This

    <0.01%

    Held 5th. 2.4K estimated branded searches, 0% vs prior month. Share 0 points.

Compare popularity between NotebookLM and its closest rivals

Every comparison with NotebookLM

16 comparisons

How has branded search demand for NotebookLM changed worldwide over the last 12 months?

2 findings
  • Across the 12 months ending September 2026, estimated monthly branded searches for NotebookLM worldwide rose from 11.9M to 24.5M.
  • Across the 12 months ending September 2026, NotebookLM’s share of searches among AI summarisation tools worldwide increased from 54.9% to 81.9%.

How did search popularity change for AI summarisation tools worldwide in September 2026?

5 changes

  1. In September 2026, NotebookLM gained share of searches among AI summarisation tools worldwide, from 78.7% to 81.9%.

  2. In September 2026, QuillBot lost share of searches among AI summarisation tools worldwide, from 19.7% to 16.7%.

  3. Estimated monthly branded searches for Scholarcy worldwide fell 63.5% over 12 measured months, from 40.5K to 14.8K in September 2026.

  4. Estimated monthly branded searches for TLDR This worldwide fell 55.6% over 12 measured months, from 5.4K to 2.4K in September 2026.

  5. Estimated monthly branded searches for Otter worldwide fell 32.8% over 12 measured months, from 569K to 382K in September 2026.

How are NotebookLM’s branded searches counted?

2 search terms

Brandwave collects information about searches that people make online using NotebookLM’s name. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brand is growing, holding steady, or fading.

  • notebook lm
  • notebooklm

How the Brand Demand Index is measured

Who owns NotebookLM?

NotebookLM is owned by Google. Brandwave also tracks AppSheet, Chrome Remote Desktop, Display & Video 360, Firebase, Fitbit, Gemini, Gmail, Google, Google Ads, Google Alerts, Google Analytics, Google Artifact Registry, Google Authenticator, Google Chat, Google Chrome, Google Chromecast, Google Classroom, Google Cloud, Google Cloud Dataflow, Google Cloud Identity, Google Cloud Pub/Sub, Google Cloud Run, Google Cloud Secret Manager, Google Cloud Speech-to-Text, Google Cloud Storage, Google Cloud Vertex AI, Google Colab, Google DeepMind, Google Display & Video 360, Google Document AI, Google Drive, Google Earth Engine, Google Family Link, Google Forms, Google Keep, Google Keyword Planner, Google Maps, Google Maps Platform, Google Meet, Google Meridian, Google Nest, Google Nest Wifi, Google Project Management Certificate, Google Rich Results Test, Google Security Operations, Google Slides, Google Tasks, Google Threat Intelligence, Google Translate, Google Vault, Google Veo, Google Workspace, Looker, Looker Studio, Material Symbols, Snapseed, TensorFlow Serving, YouTube, YouTube Music, YouTube Studio and YouTube TV, owned by the same company, worldwide.

Do you work for NotebookLM? To request corrections or removal please contact us via our support page and we will be happy to assist.

Where does NotebookLM compete?

NotebookLM is ranked in four competitor sets. Each share is worked out among that set's brands, so it differs from set to set.
Competitor setRankShare of searchesRanking
AI research assistants1st of 660.8%Show ranking
AI research tools1st of 661.2%Show ranking
AI summarisation tools1st of 581.9%Shown above
AI PDF tools1st of 786.2%Show ranking
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